# @Version:1.0
# @Author：green-citrus

# list_a = [1, 2, "aa", "bb"]
# print(list_a)
#
# list_a.append(99)
# print(list_a)
#
# print(list_a.count(2))
#
# list_a.extend([33, 22, 99, 2, 1, "haha"])
# print(list_a)
#
# list_b = [ele for ele in "张三啊"]
# print(list_b)
#
# list_c = [ele * ele for ele in range(1, 11)]
# print(list_c)

# a = []
# for i in range(3): # 0 1 2
#     score = float(input(f"请输入第{i}个成绩："));
#     a.append(score)
# print(a)